I would rather ramp up to my heaviest weight. In my mind if you can handle 220x5 but you try to fatigue your muscle with sets of 10 before hand and can only manage say 205x5 have you given yourself much reason to grow?
I'm not sure you quite understand DC if you are saying they use fatigue to cause growth, it's the progessively heavier poundages and food that cause growth.
If you are considering doing DC or using some of Dante's principles, you should do some more reading on his site. There is a decent thread here too if you can cut through the places where people are posting incorrect information.
I've had good results using your approach there. Staying in the rep failure zone of 5-10 I used for hypertropy ...with short rest periods .. failing at around the 5 rep range near the last couple sets. I was using 7 sets though and trying to stay under 50 total reps ...if I went over I added weight. I think the key for hypertrophy isn't so much the load RM per sey, but the rest interval along with that load RM. 5 reps with your 10 RM when you're fatigued can be just as straining as 10 reps with your 10 RM.
In all forms of hypertrophy, you are looking for fatigue some way or another to release those metabolic processes.
I don't think it matters much, 5 reps, 10 reps, or repping in between due to fatigue. I think fatigue is what makes the difference within a reasonable failure range of course, for significant hypertrophy.